A train moves towards a stationary observer with speed 34 m/s. The train sounds a whistle and its frequency registered by the observer if f 1 . If the speed of the train is reduced to 17 m/s, the frequency registered is f 2 . If speed of sound is 340 m/s, then the ratio f 1 /f 2 is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
⇒ 
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